Programmer Group

pthread Thread Knowledge Points The two fundamental issues of communication between threads are mutual exclusion and synchronization.` #include<pthread.h> 1. pthread_create1. Function Prototypeint pthread_create(pthread_t tidp,const pthread_attr_t attr,(void)(start_rtn)(void),void arg); 2. Functional functions:pthread_create is a functio ...

If the crawler does not have exception handling, the program will crash and stop working once an error occurs in the crawl, and exception handling can continue even if an error occurs. 1. Common status codes 301: redirect to a new URL, permanent 302: Redirected to temporary URL, non-permanent 304: Reque ...

Objective-C Advanced Programming: iOS and OS X Multithreading and Memory Management This chapter explains Block-related knowledge. Because the author converted Objective-C code into C++ code, it was very hard to read it for the first time, and I don't remember how many times I read it myself. This summary is not only the content of this book, ...

In the development of iOS, sometimes it is necessary to set blurred pictures to achieve better user experience for specific effects. After iOS7, translucent blurring effect has been widely used. Now it can be seen that many applications use image blurring effect locally, and can achieve image blurring effect through Gauss blurring and ground ...

Preface Blocks are an extension of the C language, and Apple introduced this new feature, Blocks, in OS X Snow Leopard and iOS 4.Since then, Block has appeared in various API s on iOS and Mac systems and has been widely used.A sentence for Blocks, an anonymous function with an automatic variable (a local variable). Block is implemented ...

Sed is a stream editor. It is a very useful tool in text processing. It can perfectly cooperate with regular expressions and has extraordinary functions. When processing, the currently processed rows are stored in a temporary buffer called pattern space, and then the contents of the buffer are processed with sed command. Afte ...

Assignment 1: Programming and designing the color of movie posters Assignment 1: Designing color visualization works for movie posters. Imitate the color of movie posters on page 43 of Chapter IV of PPT for visualization since 1914. Design and implement the color visualization works of domestic movie posters from 2008 to 2018 ...

background No backup, no security. Especially those old hard drives that don't know how many years they've been using, have some bad ways, they can't be repaired, and the data in them can't be copied. It's a real ghost. disk array MAC OS 10.11 and later systems, disk arrays in disk tools have disappeared, I wipe. Explain the disk arra ...

This case simulates the landing of Renren in three different ways. It is a classic case of traditional simulated landing. Readers are invited to consult it carefully. Setting session to simulate login Include cookies in headers for simulated Login Simulate login by specifying cookies separately 1. The method of setting ses ...

I. Container Life Cycle Management 1. create Command Interpretation: Create a container, but do not start. The container name is mynginx leoheng-MacBook-Pro:~ leo$ docker create --name mynginx nginx:latest Unable to find image 'nginx:latest' locally latest: Pulling from library/nginx a5a6f2f73cd8: Pull complete 1ba02017c4b2: Pull complet ...